Cutting and stripping machine for pavement joints and the like



NOV. 6, 1934. w HUNTINGTON 1,979,554

CUTTING AND STRIPPING MACHINE FOR PAVEMENT JOINTS AND THE LIKE FiledJune 22. 1952 Patented Nov. 6, 1934 PATENT OFFICE ondemn 'STRIPPINGMACHINE FOR,

[PAVEMENT JorNTsAND THE LIKE George W. Huntington, Glencoe, Minn.Application June 22, 1932, Serial No. 618,602

4 Claims.

J invention relates to cutting :and' stripping'machines adapted forwidegeneral use and particularly adapted for cutting; stripping and removingtheexcess material Lor -filling from expansion 'ioints betweenpavement-sections.

Concrete or other types of .conventi-onalpavements and roads are usuallyconstructed insections or slabs spaced a slight distance apart,usuallyqian inch or two (to allow for expansion in ll) hot .weather')..Joints are formed between the sections with .a suitable plastic fillingmaterial, usually a coal :tar product or pitch, which is very toughanddifficult to cut when hard. .In warm weather thismaterialswellsupwardlydue to the expansion of the pavement sections as well asits own expansion and producesobjectionable ridges inlthe' pavement. 1

.Heretofore' State and county highway departments have removed theseridges by manual la bar and the task has beenlabonous, difficult, hasrequired considerable time and the employment of a large number ,ofzmen,I

It is an object .of my present intention to provide a simple, compactand highly efficient ma chine .which will cut and stripmaterial from theground, road or pavement quickly and efficiently,

It is a further object to provide-amachine of the class described which"will have'ahigh capacity f or work, "which is portable and which may.30 bepushed or pulleduove'r the ground carrying its own source ofpower. I

It is a'furth'er object to provide such a device wherein the :materialis .eificiently cut and stripped withoutu chopping or disintegration Ithereby enabling the removed material, to be readily collected and ifdesired to be conserved. Another object is to provide a device of theclass described wherein the height of the cutting blade may be adjustedwithin reasonable limits. These and other objects and advantages of theinvention will be more fully set forth in the following description madein connection with the accompanying drawing, in which like referencecharacters refer to similar parts throughout the several views, and inwhich:

Fig. 1 is a top plan view of an embodiment of my invention designed forpavement work;

Fig. 2 is a side elevation of thesame Fig. 3 is a front end elevation ofthe machine,

59 and Fig. 4 is a detail sectional view showing the ad justablemounting of one of the front wheels of the frame.

F The form of my invention illustrated includes a portablewheeled framecomprising a pair of slightly inclined parallel angle bars 5 havinginwardly extended webs and vertically extending outer webs. The forwardends of angle bars 5 are connected together by a rigid strut 6 which, itwill be noted, has widened depending ends 6a portions of which projectforwardly of the forward ends of the angle bars. A pair of small wheels7 are adjustably connected with the depending portions 6a of the strut,said wheels being disposed exteriorly of the strut and being revolublymounted upon fixed stubaxles 8 the inner ends of which are disposed inslots 6b and are threaded to receive clamping nuts 9. A clamping flange8a is provided some distance outward of the inner end of each stub axleadapted to engage'the outer side of the strut. It will be obvious thatthe wheels may be adjusted vertically within the slotted portions of thestruts and rigidly clamped in a desired adjusted position. The medialportions'of the angle bars 5 are secured to the forward and lower endsof elongated inclined push bars 10 which extend for some distancerearwardly of the machine and at their upper ends are connected by meansof a suitable handle 11. A pair of brace members 12 connect the medialportions of push bars 10 with the rear ends of angle bars 5 forming astrong frame structure. A rear axle 13 is connected with the medialportion of the brace members 12 -andv may or may not, as desired, bejournaled insuitable bearings, said axle projecting outwardly ofsaid'frame members and having revolubly mounted thereon at itsprojecting ends ther elatively large rear wheels 14. v

A second strut or bridge member 15 rigidly connectsthe medial portion ofthe angle bars 5 and has its main portion spaced some distancethereabove. A suitable motor or source of power, indicated as anentirety by the letter M is fixed to the top of strut 15, said motorhaving a power shaft 16 which projects slightly beyond one side of theframe. The motor illustrated is of conventional internal combustiontype.

A reciprocable blade head in the form of a flat rectangular plate 17 ismounted between the angle bars 5and guided by the inwardly extendinglongitudinal webs thereof and also guided at its upper longitudinaledges by angle irons 18 the lower webs of which are extended inwardlyand spaced in parallel relation a short distance above the lower webs ofangle irons 5. Blade head 17 carries at its forward transverse edge adetachable blade 19 which, as shown, is rabbeted at its upper surfaceand along its inner edge and said blade may be conveniently attached bymeans or pavement.

of screws 19a. Blade 19, as clearly shown in Fig. 2, has a bevel at itsupper surface and its 20 is connected by a pitman 22 with the centralportion of blade head 17, as shown, a depending lug 22a, being providedon the blade head to facilitate this connection. The end of crankshaft20 adjacent the power shaft 16 of the motor,as-

shown, is provided with a sprocket 23 and an endless chain 24 is trainedabout said sprocket and a relatively large sprocket 25 which is fixed tothe outer end of the power shaft 16. In operation the stub axles 8 forthe front wheels 7 are adjusted and secured within the slot 61) of thefront strut to position the cutting edge of blade 19 properly withreference to the ground The motor M is then started and the machine ispushed across the surface to be treated. The rapid reciprocation ofthecutting blade in a direction longitudinal of the frame quickly andeihciently cuts the swelling or ridges in the joint between the pavementsections, stripping the tough material and guiding the same rearwardlyover the blade head beneath the struts 6 and 15. The cut strip ofmaterial drops down between the rear wheels 14 at the rear of themachine and may be easily collected or removed as it is not chopped intopieces or disintegrated.

It will be obvious that my improved machine may be put to various useswhere it is desirable to cut or strip material from a supporting surfaceover which the machine may be pushed.

The cutting edge of blade 19, it will be noted, is disposed in itsforward position directly below the axis of the front wheels '7 wherebythe blade will cut and strip uniformly regardless of inclination orirregularities in the pavement or other surface over which the machineis pushed.

Blade 19 may be readily removed and sharpened or if necessary a newblade substituted.

From the foregoing description it will a be apparent that I haveprovided a compact portable machine which will very quickly andefliciently cut and strip material from a surface, such asa pavement andwhich will effect a substantial economy over methods heretofore used forremoving the swelled joints between pavement sections;

It will, of course, be understood that various changes may be made inthe form, details, pro-,

portions and arrangement of the parts, without departing from the scopeof my invention, which, generally stated, consists in a device capableof carrying out the objects above set forth, and in the novel parts andcombinations of parts disclosed and defined in the appended claims.

What is claimed is:

1. In a cutting. and stripping machine, a wheeled frame, a strippingblade mounted transverselyof said frame and inclined somewhat withrespect to the horizontal from its forward or cutting edge to its rearlongitudinal edge, means for reciprocating said blade longitudinally ofthe machine, said frame having a pair of wheels, the axis of which isdisposed some distance above the forward or cutting edge of said bladeand substantially invertical alignment therewith.

2. In a cuttingand stripping machine, a frame, a pair of front wheels, apair of rear wheels supporting said frame, a stripping blade mounted insaid frame for reciprocating movement longitudinally thereof, said bladebeing inclined from its forward to its rearend and having a cutting edgeat its forward end disposed approximately vertically below the axis ofsaid front wheels and a source of power mounted on said frame forreciprocating said blade. I

3. In a cutting and stripping machine, a wheeled frame, a strippingblademounted in said frame for reciprocating movement longitudinallythereof, said blade being inclinedsomewha-t from its forward end to itsrear end, and having its forward end disposed adjacent the ground line,a motor support mounted on said frame and spaced some distance abovesaid blade to allow material cut topass therebelow and a motor. mountedon said support for reciprocating said cutting blade.

4. In a cutting and stripping machine, a frame including a pair ofspaced longitudinal members, longitudinal guides in said membersinclined from the front to the rear of said frame, a reciprocating bladehead mounted in said guides and having a cutting edge at the forward endthereof disposed adjacent the ground level, a pair of front wheelsdisposed outwardly of said blade head for supporting the forward end ofsaid frame and a pair of rear wheels disposed outwardly of said framefor supporting the rear thereof, a motor support mounted onsaid frameand spaced above said blade head to enable cut material to pass oversaid blade head and under said support, amotor mounted on said supportfor reciprocating said blade head and means connected with said frame bywhich the device may be moved over asurface to be treated. l

I GEORGE W. HUNTINGTON.

